Casting machine



Aug. 9, 1932. w. J. DEMMING CASTING MACHINE Filed Dec. 18, 1950 12 Sheets-Sheet l l lg 9, 1932- w. J. DMMING 1,371,045

CASTING MACHINE Filed DGO. 18. 1950 l2 sheKefS-sheet 2 J-v I V 2 Z Allg. 9, 1932. w J, DEMMNG 1,871,045

CASTING MACHINE Filed Dea. ,18, 19:50 12 Sheets-Sheep 5 'O' //Jj @Mm @2g/m,

v am@ Aug. 9, 1932. w. J. DEMWNG CASTING MACHINE Filed Dec. 18. 1930 12. Sheets-Sheet 4 W. J. DEMMING CASTING MACHINE Filed Dec. 18, l19:50 12 Sheets-Sheet 5 G-r" IO alito/:Magd

Aug. 9, 1932. w. J. DEMMIN'G 1,871,045

CASTING MACHINE Filed Deo. 18, 1930 12, Sheets-Sheet 6 CASTING MACHINE .rw/Q6 w. J. Dl-:MMING Filed Dec. 18, 1930 Aug. 9, 1932.

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Aug. 9, 1932. w. J. DEMMING 1,871,045

CASTING MAGHINEv Filed Deo. 18. 1930 1?, Sheets-Sheet 8 zza Aug..9, 1932. w. .1. DEMMING CASTING MACHINE Filed Deo. 18, 1930 l?, Sheets-Sheet 9 abbe/naal TTG-.122

Aug. 9, 1932. v w, J, DEMMING 1,871,045

- CASTING MACHINE Filed Dc. 1s; 1s 5o 12 sheets-sheet 1o muy AU@ 9, 1932- w. J. DEMMING 1,871,045

CASTING MACHINE Filed Dec. 18. 1930 1 2 Sheets-Sheet 1l.

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'Illl Moa/mw Patented ug. 9, 1932 treo' stares PA'rienr ori-"ie WILLAIVI DEMMING, DECEASED, LTEOF LAKEWOOD, OHIO, BY AGNES M. DEMMNG,

ADMINISTRATBJIX, OF LAKEWOOD, OHIO, ASSIGNOR VTO MULTIGRAPI-I COMPANY, OF ftTILMING'IOlil',iDELAKABE, A CORPORATION 0F DELAWARE Gesteine i/iiicnrivn Application Vfiled December 18, 1930. Serial No. 503,163.

T his invention relates to casting machines, and especially automatic machines for casting small articles at a highrate of speed and automatically delivering them to a'fsuitable receiving receptacle. The machine is adapted for casting articles of various shapes, either of molten metal or of soine composition,as for instance, a phenol compound such as balrelite. It has hoivever been designed With special reference to casting printers type.

This invention has a rotary mold carrier, a melting pot from which molten metal may be ejected into the molds as presented, and

means for receiving discharge from the mold carrier. `Type casting machines havingthis broad characteristic have been proposed in the past, but such machines have usually been intermittent in their movements. This inaterially reduces the speed of operation of a r continuously rotary machine, iirst, because of the lull between periods of movement ofthe rotor; and, second, because-a mold carrier of a casting machine is usually of considerable weight and, if it is rotated at any great speed the momentum precludes instantaneous stopping of the parts, and causes quite a delay inV the movement of the mechanism. The latter is especially true Where the mold carrier emy bodies a. comparatively large number of indin vidual molds or dies.

The above mentioned delays would not be apparent in a machine Where the mold carrier rotates continuously but when continuous ro- ,y tation is considered, one of the primary dith-V culties that has heretofore been encountered,

and has heretofore prevented practical use ot a continuously rotated casting machine is the problem of discharging the castings` This is especially true iii the case of such for this purpose that a plurality of matrices,

each diifering from the other,be provided,

sothat an entire font or other assortment of type may be cast Without necessitating frequent changing of the matrices. i The casting machine, in which has been embodied this invention, is so constructed that a plurality of matrices, having different characters thereon, may be used, and that thetype at the point or' ejection Will always lie With its face in a predetermined position. l y

When the casting machine is of the chai'zvtc-V ter above speciied, it is particularly desiri able to provide a receiving means into which the casts may be discharged, and Which will retain them in their relative positions, moreover, which will be of such a nature as Will not interfere with the continuous rotation of the mold carrier. l i

Heretoore this has been attempted by the use of conveyors which carried the type away one at a time, but in such cases great diliiculties Were encountered in assembling the type or castings fromthe conveyor into groups, each group containing castings or type having the same character thereon, and each type bearing the same relationship to the other.

This invention contemplates the provision of a simple mechanism which may operate in synchronism With the molding or casting mechanism, and Which Will be adapted to receive the type from the molds, retaining them in their relative positions and grouping the type so that a quantity of each character, i. e., a quantity of'type from each mo-ld is collected together as a unit. u

- TheV general object of this invention is to provide a casting machine, capable of high production and wherein the castings may be discharged in stacked relationship and in Which the diiliculties heretofore Vmentioned are overcome. A further object is to provide a. rotary carrier which has a number of type clearance in the type receiving channels may A permit the mold to be positioned over the channel for a slight annular distance. This distance is necessarily extremely slight, where the mold wheel is rotating at any appreciable speed, because the interval of time in which the type must be ejected from one rotating member to the other is comparatively small.

Hence, another object' of this invention is the provision of means whereby the type may enter a guideway which is adapted to lie between the type casting mechanism and the type receiving mechanism, which guideway is capable of movementl relative to both mechanisms and by means of which thev type may be discharged .from the rcasting mechanism, at various points other than the exact point ofjuxtaposition.

.'Due to the diiiiculties heretofore mentioned, rotary type casting machines, especially those where the rotation is continuous, have rarely been used, hence the development in such casting machines hasheretofore been neglected. However, when the vditliculties of discharging the castings are overcome, a result accomplished by this invention, it was found desirable to improve the casting machine itself so that it will be comparatively s imple'and capable of being operated at a comparatively high rate of speed.

Accordingly, one of the objects of this invention is the improvement of the casting mechanism itself, enabling it to operate at a high rate of speed, this improvement relating to the rotary carrier having a plurality of molds which operate automatically as 'they assume various positions for makingthe cast.- ing and shearing'the sprue, 'and foreiiecting discharge; All of these features will become apparent rom'the detailed description of a preferredembodiment hereinafter given.

' Fig. 1 is aplan view of one'form of a casting machine', embodying the invention, being aform which' is especially adapted for use inthe casting of printers slugs, or type; Fig.

1A isa fragmentary plan of a portion of thev casting machine shown in Fig. 1 and extending to the leftthereof; Fig. 2 is a transverse vertical section of the casting machine, illus trated in Fig. '1, and indicated by the line 2.-.-2 on Fig. 1; Fig. 3 is a section, in the same planeas that of Fig. 2, illustrating some ofV the parts, and on a larger scale; Fig. 4 is a sectional detail of a mold and aportion of metal feeding nozzle; Fig. 5 is a horizontal section taken through portions of the mold carrier and melting pot, and is indicated by the line 5-5 on Fig. 3; Fig.v 6 is a horizontal section on an enlarged scale through a mold, and is taken in the same plane as Fig. 5 Figs. 7, Sand 9 are horizontal sections, taken in dierent planes, through the mold members, asindicated by the lines 7-7, 8 8 and 9 9 on Fig. 3; Fig. 10 is a vertical section through the mold, illustrating the manner of lubricating the mold members, and is indicated by the line lO-lO on Fig. 8; Fig. 11 is a horizontal section, through certainV of the mold supporting members, and is indicated by the line 11-.11 on Fig. 3; Fig. 12 is a sectional detail of another mold supporting member, and is indicated by the line 12-12 in Fig. 5; Fig. 13 is a vertical section through the mold carrier and a mold, Iindicated by the line 13-13 on Fig. 5 and illustrates a mold in the sprue shearing position; Fig. 11i is a vertical section through the die carrier and a die at the point of casting discharge, and is Iindicated by the line 14:-14 in Fig. 5; Figs. l5, 16 and 17 are perspective views showing a type and sprue, andl is illustrative oi one of the-forms of castings which the machine lis capable of producing; Fig. 18 is a longitudinal vertical section, taken through the melting pot and a portion oi' theoperating mechanismtherefor, and is indicated by the line 18--18 in Fig.2; Figs. 19 and 2O are detail sections ofthe melting pot pressure regulator,and are indicated bythe lines 19-19 and 20-20 on Fig. 2; Fig. 21 isyan enlarged vertical section through a portion of the melting pot andpump mechanism, and is indicated by the line 21-21 on Fig. 1; Fig. 22 is a vertical section in a plane at approximately a right angle to the plane of Fig. 2, illustratingY the casting discharge and the receiving mechanism, and is indicated by the line 22--22 in Fig. 1; Fig. 23 is a detail section taken along the same plane as Figs. 1i 'and 22 and being approximately that portion of Figs. 14 and 22 'which is enclosed by the dot and dash circle23 on those iigures; Figs. 24 and 25'are horizontal sections of the casting receiving mechanism, taken along the lines 24-24 and 25-25 of Fig. 23; Figs. 26 and 27 are perspective views illustrating guiding members for guidingthecastings as they are discharged from the cast-ing mechanism; Fig. 28 is a diagrammatic illustration of the operation of the type-guidi-ng mechanism during discharge; Fig. 29v is a horizontal section illustrating the driving mechanism for the casting discharge drums, and is indicated by the l-ines 29--29 on Fig. 22; Fig. 30 is a horizontal section through aportion of the casting receiving mechanism, and is indicated by the line 30.-30 on Fig. 22; Fig. 31 is a fragmentary plan illustrative of amethod of adjusting the driving mechanism for the casting receiving units; Fig. 82 is a vertical section through a portion of the adjusting mechanism for aligning the receiving drums with the type casting mechanism, and is indicated by the line 32-32 on Fig. 30.

In the embodiment'shown, there is provided a main frame member 10, adapted to support thel different units of the casting machine, namely, the die carrier, the melting pot, yand the casting receiving mechanism. The frame lpcomprises a base 11, having upstanding sides 12, or top portion 14.

Located vertically within the frame 10 is a main drive shaft l5, j ournalled in bearings 16 and 17, associated with the top and base frame members 14 and 11 respectively. `The bearing 16 is retained in position on the shaft 15 between a collar portion 18 of the shaft and a clamping nut 19, and -is retained in a recess in the frame member 14 by a plate 20, thereby supporting the shaft against vertical displacement at a point adjacent the top frame member 14. The lower bearing 17 is secured to the shaft between; the hub 21 of a gear member 22 and a clamping nut 23.

Due to the heat applied to the casting mechanisms, it is desirous to permit vertical expansion of the shaft 15. The bearing 17, therefore, is mounted, free, for vertical movement in a bearing box 24 secured to the base 11 by suitable bolts, not shown. The shaft 15 may be driven in any suitable manner, such as by a motor 25 and gearing hereinafter to be described.

A mold carrier 40 is mounted on a tapered portion 30 of the shaft 15, which extends above the frame member 14 and the bearing 16. The mold or die carrier 40 is drivingly secured to the taper-ed portion 30 by means of a key 31 and a clamping nut 32. rlhe mold carrier 40 is drum shaped and comprises a hub 41, a horizontal web 42, and a rim 43. There is suiiicient clearance between 'the web portion of the mold carrier and the top frame member 14 to provide for the operation of suitable mold members hereinafter to be described. The web or base portion of the die carrier has a number ofequally spaced radial grooves 45, and the rim portion 4S is provided with a corresponding number of vertically extending grooves 45, which are wider than the grooves 45 but are centrally located with reference to them. Associated with each pair of grooves 45 and 4G is a die l or mold comprising relatively stationary members and relatively movable members.

Y Each dieor mold comprises a matrix carri er 50, which is mounted for reciprocal-ion in the corresponding groove 45. Associated with each matrix carrier is a matrix 51 which lies in a recess 52 of the matrix carrier. Each matrix has a character die portion 53, which, when in casting position, is substantially a continuation of the inner face 47 of the groove 4G. The characters may be identical with each other or may differ from each other, and the molds likewise may be adapted to cast type of the same or diiferent shapes and sizes.

rlhe matrix carrier is retained in the groove 45 by means of suitable locking plates 55, best illustrated in Figs. 3, 5 and 12. Where the molds, contained inthe mold carrier, are of an even number, each locking plate 55 retains two matrix carriers.A in position.

However, in the embodiment illustrated, there which support a head,r

toa stud 57, which passes through an open-v ing in themold carrier 40. A small spacing washer 58, threaded to the stud 57, adj acent the plate 55, acts as a jamb-nut to prevent relative rotation between the plate 55A and the stud, as well as to space the plate 55 in the proper position below the mold carrier,

relative to the under surface of the matrix carrier 50. The stud 57 has an enlarged flanged portion 58 as its upper end, which bears against the web 42 of the mold carrier, thereby retaining the plate 55 in position relative to the die carrier. The stud 57 is also provided with a squared head portion 59, by means of which the locking plate 55 may be rotated, so that a flattened portion 60 of the plate may be presented to the matrix carrier, in which case the carrier will be free of the plate 55 and Vmay readily be removed.

To retain the plate 55. in a locked or engaged position, in which position the plate 55 underlies the matrix carriers, there is provided a spring-pressed plunger 61,` suitably mounted in the mold carrier and adapted to engage an opening 52 in the plate 55. When it is desired to remove one of the matrix carriers, the plunger 61 is withdrawn, the stud 59 is rotated, towards the carrier to be removed, until an abutment 62 of the spacing.

washer 58 engages a suitable stop in the form of a pin 63, mounted in the upper face of the mold carrier, at which time the flattened side 60 of the plate 55 will be in position to permit the matrix carrier to be removed by a downward movement.

In the embodiment shown, the molds are designed for casting printersy type, particularly such forms as are used on the standard multigraph. lThis form is best illustrated in,

Vtwo sid-es 75 each lie in substantially three different parallel planes. Therefore, it is convenient to make those sides of the mold, which are to form the sides 75 of a plurality of pairs of members 77 (seeparticularly Fig. 6). Each pair of opposing members 77 is y adapted to mold a portion of the type, namely, one pair of members for the head, one

for the web and one for the foot.

the die carrier. This portion serves asY the bottom for the mold cavity, while the matrix 51 serves'as one side.

Inorderto obtain a more perfect casting and to insure that the castings will beof the same relative height, a sprue mold7 9 is provided adacent the type mold 90, the sides Vof which are embraced by plates 81. Suitable bolts 83, passing through openings in a mold retaining plate 82and the mold members 7 7 and 81 retain them in position in the slot 46 of the mold carrier 40.

The upper surface of the mold cavity is formed by the lower ends of two vertical bars 85 and 86, which are mounted for vertical movement in extending portions of the mold members 77 and 81 andthe carri-er 40. The mold member 85 has the same cross sectional shape as the type, while the mold member 86 has the same cross sectional shape as the sprue 78, as shown particularly in Fig. 7. This permits them to be readilyreciprocated between the extensions of the mold members 77 and the mold members 81 respectively, and prevents the escape of molten metal. The members 7 7 and 81 extend downward to contact with the upper face of an extending portion 65 (Figs. 4 and 10) ofthe matrix carrier, and they extend upward approximately half the height of the rim 48 of the mold carrier. Above the members 77 and'81 are blocks 87 which are secured in position on the die carrier by means of the retaining plate 82 and suitable bolts 88, and act as guides for the bars 90 and 91 which operate the bars 85, 86.

It will be noted that the opening formed between the blocks 87 is substantially rectangular in shape (Fig. 8), and that these blocks are separated by a distance equal to the maximum width of the mold cavity, thus permitting the reciprocation of the members 85 and 8G between them. This permits the bars 90 and 91 (constituting in effect the upper portions of the die members 85 and 86) to be substantially rectangular in shape, whereby the surface friction between them and the associated guideways is materially lessened and the members, themselves, are considerably strengthened. The sections 85 and 90 are interloclred by complimentary hookshaped portions 92, by means of which they may be raised and lower as aunit, andV the members 86 and 91 are correspondingly con-v nected by similar complimentary hooks 98.

It will be seen from the. foregoing description that the top face of the mold cavity is formed by the movable mold members 85 and 86; the bottom face of the cavity is formed by an extension 65 'of the matrix carrier 50; the innermost side of the mold cavity (that which forms the face of the type)Y is formed by the matrix members 51, the adjacent sides i are formed by the relatively stationary mem- `movable mold members and their operating bars, oil openings 96 are provided in a plate 97 (see Fig. 10) secured to the tops of the blocks 87.v On the side of these openings, which is at the rear, considering their reference with the direction of travel, isan upstanding lip 98 which is adapted to coact with an oil wiclr 99 suitably carried by some stationary part of the machine and leading downward from an oil receptacle to a position slightly below the tops of the lips 98. Thus, once each rotation of the mold carrier, each mold receives a slight access of oil, which maintains the vertically moving parts in a lubricated condition. l

Figs. 2, 8, 4, 5 and 6 illustrate the relative position of the mold parts at the point of casting. In this position the matrix carrier 50, which forms the lower face of the mold cavity extends outward and contacts with the plate 101 of the melting potand the movable mold members 85 and 86 are in their uppermost positions. As the mold carrier rotates (in a counterclockwise direction for one looking down on it, see Figs. 5 and 6) the sprue opening 79 of the mold approaches an opening 102 in the plate 101 and the molten metal is then forced from the nozzle 100, through the opening, into lthe mold cavity, by means hereinafter to be described.

The upper ends of the members 90 and 91 are lprovided with suitable rollers 94, which are engaged by cams hereinafter to be described, to'raise and lower them for the different mold conditions, namely; casting,

sprue-shearing and ej ecting. The matrixcarrier 50 is likewise provided with a roller 95,

vwhich will be acted on `byfcains hereinafter described, so that itwill properly move horizontally to cooperate with the members 85 and 86 iii the different mold positions.

- As the mold carrier continues in its rotation, a stationary annular cam 108, rigidly mounted on the member 14, acting in the roller 95, draws the matrix carrier 50 inwardly, until it reaches a point(illustrated in Fig. 18) wherethe outer face 61 of the matrix carrierV is in' alignment with the inner face of the mold member 86, at which time a stationary annularly grooved Vcam 105, coacts with the roller 94 of the mold member 86 and forces the latter downwardly to the position illustrated in Fig. 13. This causes t-he sprue 78 to be sheared from the type portion ioo of the casting. As the rotor 4continues in its rotation, the cam 103 draws the matrix carrier and its matrix inwardly to a point where the face 65 of the matrix carrier clears the mold cavity.

In the latter part of the trav-el of any matrix carrier while it is in the with drawn position, the mold member 36 is forced downwardly by means of a stationary annular grooved cam 106 to the position shown in F ig. 23, thereby forcibly discharging the type from the mold cavity. r1`his operation will be referred to later in connection with the description of the type receiving receptacle. The cams 103 and 106 are secured to a bracket 107 attached to a boss 103 on the frame members 14 by means of suitable bolts 109.

1t is desirable to cool the mold before the type is ejected therefrom. To this end there is provided a hollow shoe 110, which lies radially opposite the casting point and coacts with the outer face of the molds and mold carrier. rEhe shoe 110 is arcuate shaped and is adapted to coact with a comparatively large portion of the circumference of the mold wheel. The shoe has a horizontal partition 111 dividing it into a passageway 112 through which a suitable cooling liquid may circulate. A pipe 114 leads from a pump or a suitable pressure supply to the shoe, and a pipe'116 leads from the shoe to adrain, thereby providing a circulation of the liquid through the shoe 110 for cooling the mold. rThis prevents the molds and mold carrier from reaching an excessive temperature, due tothe constant application of heat at the casting point,

As the mold wheel continues in its revolution 'from the discharge position hereinafter described, the cams 105 and 106 return the mold members and 86 to their casting position, while, at the same time, a cam member 116 coacts with the roller 95 of the matrix carrier and returns the latter to its casting position. To prevent undue strain upon the mold members and seepage or leakage .of metal, it is desirable that one of the mold members be retained in casting posit-ion resilently. To this end, it is preferable to mount the matrix carrier resiliently.

As shown, the cam 116 is pivotally mounted on the cam 103 at 117, and is urged against the rollers of the matrix carriers by means of a spring pressed plunger 118, mounted in a boss 119 on the cam member 103. This provides a resilient mounting in a horizontal plane.

V`Means is also provided whereby the matrix carrier is resilient-ly retained in a vertical plane. Mounted in a housing 120 secured to the frame member 12 and in line with the nozzle or the melting pot, is a vertical plunger 121, which carries a roller 122 adapted to cowith the under surface Vof the matrix carrier, at a point directly below the type casting portion of the mold, when the latter is in castingposition. The plunger 121 is urged upwardly, against the matrix carrier, by a spring 123 retained in the housing 120 by means of a threaded plug 124.v The upward c mov-ement of the plunger 121 is limited by *70 means of an extended threaded portion 125 of the plunger, which passes downwardly through an opening in the plug 124 and carries nuts 126 adapted to coact with the plug 1t is likewise desirable to provide a resilient mounting for the matrix carrier when the latter is in the sprue shearing position.

As shown in Fig. 13, a plunger' 130 having a ,Y V

roller 131' adapted to coact with the matrix carrier, lies directly beneath the type portion of the mold cavity at a point where the sprue portion 7 8 is severed from the type. v The plunger is mounted in a housing 131 secured to the frame member- 12 Vand has a threaded portion 132 extending through the bottom 133 of the housing 131 and is held against undue vertical movement, by means of the nuts 134. A suitable spring 135 urges the Y,

plunger upward. y Y

As only the upper portion o the shield plate 101, which is associated with the nozzle of the melting pot and closes the mold'eavity, bears against the mold carrier 40,` it is desirable to provide means to adjustably support the lower portion of the plate, so that it will bear evenlyl against the mold wheel, thereby preventing the seepage of molten metal between the plate and the mold carrier. It is preferable that such means be adjustable, bei cause while, the mold wheelis constantly rotating and to some extent being cooled, the lower portion of the shield plate 101 is supported by a relatively stationary member 136,

wherefore some differences in expansion and i wear will exist. Y

The adjustment above mentioned is best illustrated in Figs. 1, 3 and 11. As there shown, the member 135 is mounted for sliding movement in Va block 137, mounted on the block 137 for movement at approximately right angles to the movement of the member 136. The wedge 141 is adjusted ley-means of suitable screws 142 threaded in the block 137 and coacting with opposite ends of the wedge, to move it in one direction orithe other, as is required, to project or allow the retraction of the member 136. The screws 142 are supplied with suitable loclr nuts 144, so that they maybe locked securely' in position, as this Y adjustment between the member 136 and the jplate 1Y01lneed be-made only at infrequent intervals. l

The melting pot and pump may be of anyV well known construction.V However, as the mold carrier, heretofore described, is adapted for continuous rotation at a relatively high speed, it is preferable to use a melting pot Aand pump, which will maintain the molten -metal at a constant predetermined pressure,

and which will supply metal of such constant pressure under a practically continuous tially circular in cross section and has on opposite sides thereof outwardly extending horizontal ribs 155, which rest on bracket mem-v bers 156 integral with the main frame casting 10. lf desired, to facilitate movement of the melting pot towards the mold carrier, suitable rollers (not shown) may be interposed between the flanges and the brackets 156. Y

The 4melting pot is yieldinglyv retained in Contact with the mold carri-er by means of a link 158 (Fig. 1A) pivoted to a-l lug-159 of f the., melting pot, diametrically opposite the ynozzle 153. The other end of the link is pivoted to a plunger 160' slidably mounted in a yoke 161 secured tothe brackets 156.V A

spring 162 mounted on the yoke 161, urges the plunger 160, the link 158,` and the melting pot towards the mold carrier. It is desirable at times when the machine is idle to withdraw the melting pot from contact with the mold carrier. Therefore, one arm ofthe `vyoke 161 is pivoted to one of the bracket members 156, as at 165, while the other arm of the yoke is'securedv to the other bracket 156 by -means of va suitable bolt or wing-nut 163.

- The metal pump is best illustrated in Figs. 1,2, .3, 4, 18, 19 and 21, and comprises a plurality of pistons 17 0, mounted-for reciproca- `tion'in cylinders 171 in a boss 172 of the melting potl Y The cylinders are lined with sleeves 17 3', pressed in openings 174 in the boss 172,

vas illustrated in Fig. 21. The boss 172 and each sleeve 173 is provided with an inlet port 175,-to` permit molten metal to flow from the pot into each pump cylinder, and on the downward movement of a pump piston the'metal is forced 'downwardly through an nopening 176 in the cylinder, 'forcing a check valve 177 .downwardly against a boss 178 of a plug 179, at the base of the melting pot. Each check valve 177 has a slot 180 by means of which metal passes from the cylinder to a passageway 181 in the boss 172.

As'the plunger 17 0 is drawn upwardly,the check valve 177 is forced upwardly due to the pressure inthe passageway Y18,1 and the 'opening 180kV in the check valve is'closed byncontact'l with the sleeve 173, thereby creating further vacuum within the cylinder. When the piston reaches a point above the inlet port 175 molten metal will again flow into the cylinder and the cycle of operation will begin anew.

The pressure regulator 152 is mounted in the passageway 181 (Fig. 21') between the pump and the nozzle. The molten metal passes from the passageway 181 into a chamber 182, which communicates with the pressure regulator 183. The pressure regulatorrpiston or plunger 183 is mounted in a sleeve 184, which is pressed in an opening 185 in the boss 17 2. Y

As illustrated in Fig. 2, the plunger 183 has an upwardly extending portion 186 slidably mounted in a housing 187, which housing is removably mounted in a bracket 188 I .extending from theupper face of the melting pot. A spring 189 bearing at its upper end against a nutthreaded into the hous1ngand at its lower end against a collar 190 rigidly secured to the plunger 186, acts to urge the` plunger downward against the molten metal in the cylinder 182. The force on the spring 186 may be readily adjusted by means of the plug190 which has a slotted'face suitable' foruse with a Spanner wrench. Y

It is highly desirable that the plunger `183 be mounted so that it may readily be withdrawn for purpose of cleaning the passageways if at any time the metal should show a tendency to chill or the conduit become'.-

clogged. The housing 187 therefore is slidably mounted in the bracket and is provided Vwith a pair of lookin g lugs 192 and 193. The

lugs 193 are adapted to pass through recesses 194 in the bracket 188. When the lugs align with the under surface of the boss (Fig. 19).

AThe housing 187 will then be rotated through approximately one-quarter turn, the lugs 193 then underlie the boss and the lugs 192 will overlie the brackets locking it in position against relative vertical movement. Y

The nozzle 154 is mounted in a recess 200 in an external boss 201 of the melting pot. A passageway 202 leads from the pressure regulator to the recess 200.V The nozzle 154 has a converfrin ortion 205 havin@ an onena Qi P es 1 *ing 206 inthe vertex thereof 207, and which isadapted to enter an opening 208 in the plate or shield 101 and align with the opening 102, thereby permitting the flow of metal from the pump to the sprue or casting cavity.

" Mounted within the nozzle isa plunger 209 having a tapered nose 210, adapted to coact Awith the inner taper-ed surface 211 of the nozzle, and serve as a valve. In the position 3 shown in'Figs. 3 and 4, the plunger is in a closed position. A. rock arm 212, pivotally mounted on the bracket 188 as at 213, coacts with a slot 214 in the plunger 209 to reciprol cate the latter. Any means may be used to n operate the lever or rock arm 212. As illustrated in Fig. 1, a hand lever 215, is provided which may be integral with the lever 212 and which extends outwardly from the melting pot. l

lhen the plunger 208 has been closed, the pressure due to the continuous action of the pumps will increase until the lower face of the pressure regulatorv phmger 163 rises above a port 216 in the boss 172. This prevents further increase in pressure, preventing eX- cessive strain on the parts, and maintaining the molten metal at a constant pressure.

To facilitate cleaning of the various pas sageways of the pumping mechanism, a

cleanout plug 217 is provided which is threaded into the boss 172 immediately above the passageway 181.V The plug 217 has a passageway 216, which coacts with the passageF way 181, and is connected by means of passageways `219 to an annular groove 220 in the underside of an enlarged portion 221 of the plug. This boss, when'the plug is in its lowermost position, contacts with the face of the boss 172 preventing the flow of metal from the passageway. The plug may be raised so as to permit the passage of molten metal, thereby providing a circulation to aid in forcing of the metal throughthe passage` ways. It will be seen that this cuts down the resist-ance of the chilled metal to the heated or molten metal by permitting the molten metal to circulate when it reaches an intermediate point, thereby presenting` a comparatively hot molten metal to the chilled metal at a point intermediate the pump and the nozzle. rl`he pressure regulator, when removed, serves a similar purpose thereby permitting the chilled liquid in the passageways to be heated with comparative ease.

rllhe pump plungers or pistons are reciprocated by means of suitable connecting rods 222 retained by pins 223@ on bushings 223, which are mounted on a crank shaft 224. The shaft 224 is supported directly above the pump cylinder bearings 224e, mounted on the flange or rim of the melting pot. A suitable ypulley 225 mounted on the shaft 224 is driven by means of a. belt- 226 cooperating with Va pulley 227, rigidly secured to a shaft 228,

which will be hereinafter described.

It will be seen from the foregoing that the melting pot will give a continuous flow of metal at a predetermined pressure, and is well adapted for use with a constantly rotating mold carrier such as used by the casting fnachine illustratedin the dra-wings.

rlhe type receivingmechanism is shown in Figs. 1, 14 and 22 to 32. It comprises, in general, a plurality of rotatable drum-like members 250 which carry a series of longitudinal type-receiving guides and are mounted in rotatable frame 251, so that any one of the drum-like members may be active while the others are idle for the removal ofthel type. Two such drums have been shown in the embodiment illustrated.

The frame 251 comprises upper and lower frame plates 252 and 253 respectively, which are joined together by means of upright frame members 254. The upper plate 252 has a stud-like extension 256 on which a bearing 257 is secured, by means of a suitable lock nut 258. The bearing is supported by a bracket 260, which extends from the upper main frame member 14. The bearing assembly above described, is such that the casting receiving frame is supported against vertical displacement, entirely, by means of the bracket 260. The lower plate 253 has a down-V wardly extending stud-like portion 262 which carries a bearing 263, retained in place against a shoulder 264 by means of' a nut 265. The bearing 263 is slidably mounted in a stationary sleeve 266, the construction being similar to that provided for the lower Vbearing 17 of the main shaft 15, whereby the receiving frame is free for vertical expansion. The member 266 is mounted on an extension 268 of the main frame member 11 by means of suitable bolts, not shown.

l/Vhile in the embodiment illustrated the receiving frame supports'two drums, it may readily be seen that it mayl support several of such drums. Each of the drums 250 comprises a main shaft 271 mounted by means of bearings 272 and 283 in the rotatable plates 252 and 253V respectively. The .bearings 272 are retained in position on the shaft271 by means of suitable nuts 273 and are supported f by the frame member 252. l

NowV on the lower end of the shaft 271 there is a disc 280 having an upwardly eX- tending hub 281, which is secured to the shaft 271' by means of pins 282. Y The hub 281 carf` riesthe bearing 2,83 by a nut 277. rlhe bearing 283 is mounted for vertical movement in an opening 276 inthe rotatable plate 253.

.The shaft 271 carries a circular plate 285,

which is pinned to the shaft adjacent its upper portion vimmediately below the plate 252. A. similar' plate 286 is pinned to the shaft near the lower end thereof immediately above the rotatable plate 253.

ln the embodiment illustrated, series of type retaining channels 287 which extend between thel two plates 285 and 286 and are equally spaced about their periphery, the channels being formed by means of railshaped members. secured to the upper andV lower plates, and providedwith flanges 289, which *overhang the channels 287 and are adapted to enter the grooves between the base and head portions of the type, thereby retaining them displacement, as illustrated in Figs. 23 and 24. y

rEhe receiving channels287 are located in a predetermined position relative to the mold carrier, in that the uppermost portion of the channel liesin a horizontal plane slightly bethere are a low the bottomplane of the molds, so that when a channel reaches the .lvertical plane connecting the moldcarrier axis and the .drum axis, it is disposed immediately beneath the type casting portion of the mold, and the heads 289 of the rails are directly below and adjacent the web portion of the type in the mold.

The mold wheel is constantly rotated, and the drum 270 likewise constantly rotates. Therefore, it is readily seen that the time for discharging the type or castings, from one to the other, is comparatively short. rlherefore means is provided for guiding the type from the mold to the carrier, such means being adapted to permit the discharge of the type some distance before the alignment of the mold with its type receiving channel and permitting such discharge to continue some distance after this point Vhas been passed. This is illustrated in Figs. 23 to 28 inclusive, and will now be described.

Each type receiving channel is provided with a guide block 290, which is rigidly mounted in the upper disc 285, immediately above the channel 287. The guide blocks 290 have inwardly extending ribs 291, which serve as continuations of the heads 289 of the rails. The ribs 291 are wedge-shaped (Fig. 27), the vertex of the wedge lying in the center ofthe groove formed by the web of the type and the base of the wedge overlying the head of the rails. `VThe upper portion of the opposing wedge-shaped ribs 291 are slightly bevelled towards each other so as to permit the entrance of the type at a time when they do not exactly align with the receiving,r channel. This provides in effect a type channel which is slightly larger than is necessary to hold the type. However, it has been found that such a channel is limited due to the comparatively small size of the type to be cast, as it will be noticed that the grooves between the base portion and the head portion are comparatively shallow, and therefore preventthe use of any considerable amount of loose plav in the channels or theguiding members. Hence,it is desirable to provide some means which may be associated with both the mold and the type channel guide block which will tale care of a greater movement of the type than can be done bv means of the guides 290 and the channels themselves.

In the embodiment illustrated, an intermediate guide member'295 (Figs. 25, 26 and 28) preferablvV made of a springy material, is mounted on the guide block 291. As illustrated in Fig. 6,this intermediate guide member comprises a body portion 296, which is retained in place on blocks of the guides 291 vby means of a suitable screw 297 and has arcuately extending arms 298 and 299, the outer extremities of which in their normal position, are adapted to overlie the ribs 291 ofthe guide blocks. The arms are comparatively thin relative to the width of the groove in the type. The uppermost 'portion of the extremities of the arms 298 and 299,

as illustrated in Fig. 26, are wedge-shaped and adapted to embrace the type as shown in Fig. 25. Referring now to the diagram of Fig. 28, it will be noted that the pitch circle 300 of the mold wheel slightly overlies the pitch i.A

circle 301 of the type receiving channels, and that the arms 298 and 299 of the intermediate guide blocks are substantially tangential with the pitch circle of the receiving channels, and the type are substantially same time centering thetype 70 with relation to the intermediate guide member. A f 1 As the mold andreceiving drums rotate, the type is carried to the position shown at 303 in Fig. 28, where the type is central relative to the intermediate guide'member 295 of the guide 290. However,.as the type continues in its movement to the position shown at 304. the type forces the arm 299 of the intermediate guide member to'sprin g outwardly until the type has cleared the mold, at which time the larm 299 forces the type back towards a central position relative to the guide, where it is 298 and 299. I

On the succeeding revolution of the mold wheel, asia type is forced from the mold into the intermediate guideway, it follows the same steps as did the type 70. However, the type 70 will then be shoved downward by the .newly discharged type and thus forced from the grip of the intermediate type guide into the guide 291. At all times one of the arms 298 or 299, of the intermediate guide are substantially in alignment with one ofthe ribs 291 of the guide 290, and at such time as the next succeeding type enters the bite of the -intermediate guide member it will spring the arm 298 outwardly, and release its grip on the type 70 and permit the latter to pass into the guide block 291 and thence to the channels 287.

To retain the type-in the receiving nels 287, therel is provided atthe base of each channel 'a retaining plate" 310, pivotally mounted on the base plate 286, as by a screw 311. The retaining plate 310 is swung to one iside or'the other to permit the removal of type from the channel. "When the channels in one of the drums 271 are illed with type, y the receiving frame isswung in its bearings gripped between the arms chaniso 

